Board standoff device for electrical connector assembly

Abstract

A board standoff device for mounting a first circuit board (e.g., daughter card) on a second circuit board (e.g., mother board) of an electrical connector assembly is disclosed. The first circuit board has a front end pivotably secured to a card edge connector mounted on a top surface of the second circuit board adjacent a front end thereof. The board standoff device is located around a rear end of the electrical connector assembly and includes at least one unit. Each unit includes a body fastened on the second circuit board, the body including an upward inclined latch, and a locating member detachably secured onto the body. A rear end of the first circuit board is fastened between and by the locating member and the latch of each unit. The invention can save space, facilitate heat removal during operation, and is highly adaptable and durable.

1. A board standoff device for mounting a first circuit board on a second circuit board of an electrical connector assembly, the first circuit board having a front end pivotably secured to a card edge connector mounted on a top surface of the second circuit board adjacent a front end thereof, the board standoff device being located around a rear end of the electrical connector assembly and comprising at least one unit each comprising a body fastened on the second circuit board, the body including an upward inclined latch, and a locating member detachably secured onto the body, wherein a rear end of the first circuit board is fastened between and by the locating member and the latch of each unit, wherein the body comprises a substantially rectangular opening formed on a top surface thereof, and wherein the locating member comprises two opposite, flexible positioning pegs extended downward and adapted to insert into the opening for fastening. 
   
   
     2. The board standoff device of  claim 1 , wherein the body comprises an opening having a curved edge, the opening including a post having a tapered end formed on an edge thereof, and wherein the locating member comprises a recess adapted to matingly receive the post for fastening the locating member on the opening. 
   
   
     3. The board standoff device of  claim 1 , wherein the body has an inverted U-section and comprises two legs each having a lead-in portion extended downward and adapted to insert into the second circuit board for fastening. 
   
   
     4. The board standoff device of  claim 3 , wherein the body further comprises a flexible arc-shaped member extended rearward from one leg, and wherein the latch is extended upward from an intermediate portion of the arc-shaped member. 
   
   
     5. The board standoff device of  claim 4 , wherein the arc-shaped member comprises a resilient arm having an end thereof disposed in close proximity to the other leg, and a bent tab extended from the other leg to be in close proximity to the arm. 
   
   
     6. The board standoff device of  claim 5 , wherein the arm is disposed externally of the tab. 
   
   
     7. The board standoff device of  claim 5 , wherein the arm is disposed under the tab.